Skip to main content

Improving Wastewater Mixing and Oxygenation Efficiency with Solar Powered Circulation (SPC)

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

Electrical-grid powered aeration is used to mix and oxygenate wastewater in most treatment plants. However, much more mixing than oxygenation typically is needed. This imbalance creates an operational inefficiency that increases costs and greenhouse gas emissions. The New Hampshire Department of Environmental Services directed a 3-site study to assess the ability of solar powered circulation (SPC) to reduce or eliminate the need for aeration. Water quality, odor event, sludge buildup and power consumption data were collected 1-year pre-SPC and 1.25-years during-SPC. The results generally indicated no differences between study periods in effluent flow rates, total suspended solids, biochemical oxygen demand, dissolved oxygen, pH, ammonia or nitrate levels. No discharge violations or odor events, and little or no sludge buildup, occurred during SPC. Power consumption declined by 43-91%, and payback periods were 1.5-3.9 years. These data and a 25-year, low maintenance, SPC-unit life expectancy indicated a long-term improvement in operational efficiency.

Keywords: circulation; mixing; odor; oxygenation; sludge; solar power; solar powered circulation; wastewater

Document Type: Research Article

DOI: https://doi.org/10.2175/193864710798207035

Publication date: 2010-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more